The Adjustable Crystal Mount is engineered to fit onto the Z Platform or magnetic base within a goniometer head. The recessed bottom properly positions the crystal mount over the center of the goniometer head and prevents the mount from sliding across the goniometer head during data collection. The bottom of the crystal mount is flat and closed to prevent the brass specimen pin from protruding through the bottom of the mount. The magnetic design allows for quick, convenient, and rapid placement and retrieval of the crystal mount. Finally, the crystal mount is designed with a single allen screw which allows the Z-translation of the brass specimen pin to be adjusted (up and down) and then secured in position by tightening the screw using a goniometer head key or 0.88 mm allen key.